From 39d800cb1b244a65b76ef235241e2892eb7fd0da Mon Sep 17 00:00:00 2001
From: yelvlab <wanghao19950516@gmail.com>
Date: Mon, 20 Jan 2025 11:12:05 +0800
Subject: [PATCH] =?UTF-8?q?=E6=9A=82=E5=AD=98?=
MIME-Version: 1.0
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---
 inc/rs485_protocol.h |  4 ++-
 ld/gd32e23x_gcc.ld   |  2 +-
 src/gd32e23x_it.c    |  2 +-
 src/main.c           |  3 +-
 src/rs485_protocol.c | 69 ++++++++++++++++++++++++++++++++++++++++++--
 5 files changed, 73 insertions(+), 7 deletions(-)

diff --git a/inc/rs485_protocol.h b/inc/rs485_protocol.h
index 8c0a153..6c835f6 100644
--- a/inc/rs485_protocol.h
+++ b/inc/rs485_protocol.h
@@ -23,8 +23,10 @@
 #define PROTOCOL_BOARD_TYPE       0x04
 #define PROTOCOL_PACKAGE_LENGTH   0x02
 
+#define PACKET_START_BYTE         0xD5
+
 #define MAX_SERIAL_CMD_SIZE       16
-#define MAX_SERIAL_CMD_COUNT      8
+#define BUF_SIZE      8
 
 /******************************************************************************/
 
diff --git a/ld/gd32e23x_gcc.ld b/ld/gd32e23x_gcc.ld
index a811994..65afe02 100644
--- a/ld/gd32e23x_gcc.ld
+++ b/ld/gd32e23x_gcc.ld
@@ -1,7 +1,7 @@
 /* memory map */
 MEMORY
 {
-  FLASH (rx)      : ORIGIN = 0x08000000, LENGTH = 16K
+  FLASH (rx)      : ORIGIN = 0x08000000, LENGTH = 64K
   RAM (xrw)       : ORIGIN = 0x20000000, LENGTH = 4K
 }
 
diff --git a/src/gd32e23x_it.c b/src/gd32e23x_it.c
index 492ffe1..a79d490 100644
--- a/src/gd32e23x_it.c
+++ b/src/gd32e23x_it.c
@@ -118,7 +118,7 @@ void TIMER5_IRQHandler(void) {
         } else {
             //! turn off led & reconfig timer13 period to 1000(100ms)
             gpio_bit_write(LED_PORT, LED_PIN, SET);
-            timer_autoreload_value_config(LED_BLINK_TIMER, 800);
+            timer_autoreload_value_config(LED_BLINK_TIMER, 8000);
         }
         led_status = !led_status;
     }
diff --git a/src/main.c b/src/main.c
index f3d562b..309d554 100644
--- a/src/main.c
+++ b/src/main.c
@@ -40,7 +40,8 @@ int main(void)
     while(1){
         // gd60914_get_object_tempture();
 
-        delay_ms(50);
+        delay_ms(500);
+        // start_communication();
 
 
         // ultrasonic_pwm_out_cycles(ULTRASONIC_TX_CYCLES);
diff --git a/src/rs485_protocol.c b/src/rs485_protocol.c
index cd9dffd..c81a9b9 100644
--- a/src/rs485_protocol.c
+++ b/src/rs485_protocol.c
@@ -10,7 +10,7 @@ static int buf_index_r = 0;
 static int buf_index_w = 0;
 static int buf_length = 0;
 
-static char cmd_buffer[MAX_SERIAL_CMD_COUNT][MAX_SERIAL_CMD_SIZE];
+static char cmd_buffer[BUF_SIZE][MAX_SERIAL_CMD_SIZE];
 static char serial_char = 0x00;
 
 static int serial_count = 0;
@@ -144,6 +144,15 @@ void ultrasonic_distance_report(void) {
 }
 
 void start_communication(void) {
+    if (buf_length < (BUF_SIZE - 1)) {
+        get_command();
+    }
+
+    if (buf_length) {
+        prcess_command();
+        buf_length--;
+        buf_index_r = (buf_index_r + 1) % BUF_SIZE;
+    }
 
 }
 
@@ -157,10 +166,64 @@ void get_command(void) {
 
     if (uart_available() > 0)
         delay_ms(5);
-    while (uart_available() > 0 && buf_length < BUFSIZ)
-
+    while (uart_available() > 0 && buf_length < BUF_SIZE) {
+        delay_us(100);
+        serial_char = uart_read();
+        switch (packet_state) {
+            case PS_NULL:
+                if (serial_char == PACKET_START_BYTE) {
+                    packet_state = PS_TYPE;
+                    serial_count = 0;
+                    check_sum = 0;
+                } else {
+                    serial_count = 0;
+                }
+            break;
+            case PS_TYPE:
+                packet_type = serial_char;
+            check_sum += serial_char;
+            packet_state = PS_LEN;
+            break;
+            case PS_LEN:
+                check_sum += serial_char;
+            packet_len = serial_char;
+            packet_state = PS_PAYLOAD;
+            break;
+            case PS_PAYLOAD:
+                check_sum += serial_char;
+            cmd_buffer[buf_index_w][serial_count++] = serial_char;
+            if (serial_count >= packet_len) {
+                packet_state = PS_CRC;
+            }
+            break;
+            case PS_CRC:
+                packet_state = PS_NULL;
+            if (!serial_count || check_sum != serial_char) {
+                serial_count = 0;
+                return;
+            }
+            cmd_buffer[buf_index_w][serial_count] = 0;
+            buf_index_w = (buf_index_w + 1) % BUF_SIZE;
+            buf_length++;
+            serial_count = 0;
+        }
+    }
 }
 
 void prcess_command(void) {
+    if (code_seen('M')) {
+        switch ((int)code_value()) {
+            case 1:
+                // ultrasonic_distance_report();
+                    printf("M1");
+                break;
+            case 2:
+                // gd60914_tempture_report();
+                    printf("M2");
+                break;
+            default:
+                break;
+        }
+    }
 
 }